Pyridiniumtribromide → HCID 67606434, Verbindung
Reaktionsgleichung
[CH:1]1([CH2:4][N:5]2[C:9]3[CH:10]=[CH:11][C:12]([O:14][CH3:15])=[CH:13][C:8]=3[N:7]=[N:6]2)[CH2:3][CH2:2]1.[Br-:16].[Br-].[Br-].[NH+]1C=CC=CC=1.[NH+]1C=CC=CC=1.[NH+]1C=CC=CC=1>C(O)(=O)C>[Br:16][C:13]1[C:8]2[N:7]=[N:6][N:5]([CH2:4][CH:1]3[CH2:2][CH2:3]3)[C:9]=2[CH:10]=[CH:11][C:12]=1[O:14][CH3:15]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
1-(Cyclopropylmethyl)-5-methoxy-1H-benzotriazole (22.0 g, 108 mmol) was dissolved in acetic acid (250 ml) and treated with pyridinium tribromide (41.5 g, 130 mmol). After stirring for 14 hours, the mixture was concentrated to the minimum amount of solvent with stirring volume. The residue was dissolved in ethyl acetate and washed with 1 N aqueous NaOH and diluted in an equal volume of water. The organic layer was removed, dried with sodium sulfate, filtered and concentrated in vacuo. The residue was purified by silica gel chromatography (10 to 50% ethyl acetate in heptane), providing the titled compound as an orange solid.